Gas-engine.



PATENTED NOV. 5, 1907.

E, J. STUDDARD.

GAS ENGINE. I APPLICATION FILED AfILBQ, 1907.

wi massss ELLIOTT J. STODDARD, OF DETROIT, MICHIGAN.

GAS-ENGINE.

Specification of Letters Patent. Application filed April 29- 1907.Serial No; 37076l Patented Nov. 5, 1907.

To all whom it mdy concem: Be it known that I, ELLIOTT J. Sronnann, acitizen of the United States, residing at Detroit, county of Wayne,State of Michigan, haveinvented a certain new My invention relates togas engines, and the object I of my improvements is'to provide for moreefficiently air cooling a gas engine cylinder.

In the accompanying drawing:-Figure 1, is a cross section of a portionof a gas engine cylinder, and a hodd therefor, showing an embodimentotmy invention.

Fig. 2, is a horizontal section, the section being taken on the line 22Fig. 1.

A is a portion of the gas engine ing ribs a, extendingoutward therefrom.

B, B are the two halves of a hood which being united by a joint at (1form a hood, such as is used upon automobiles. D, D, are the flanges bywhich the hood B, B is secured to the chassis of the automobile.

b indicates 'fins or flanges extending. from the walls of the hood B,13, between the ribs d. l have represented thefins B as each made bybending inward and back in parallel and adjacent folds, the sheet metalof the hood B, B

C represents sheets of paper, or other heat insulating.

material, interposed between the closely adjacent part 'Fof the foldsconstituting the fins b.

E indicates a fan by which a current of air is forced through the hoodB, B, for cooling the gas engine cylinder. By making the hood in twoparts, as indicated, the hood can be placed in position and removedtherefrom without disturbing other parts. 7

The operation of the above described device is as follows:-An air cooledengine cylinder parts with its heat in two ways: First, by imparting theheat to the air by actual contact; second, by radiating the heat, whichradiant heat'passes freely through the air without perceptiblyheatingthe air. In the ordinary arrangement of the 'cooling ribs, onerib radiates the heat. to the other, so that there is butlittleheatthrown off by radiation. By interposing a heat absorbing object, such asa fin b between adjacent. ribs, the radiant heat is absorbed bysuch finsand conducted away, or imparted by contact to the air passing over itssurface,

cylinder having cool- -heat to theother of said ribs.

and thus the rate of dissipating heat from the engine cylinder may bevery greatly increased. 1

' The heat insulating material may evidently be omitted and the outsideair allowed to circulate between the folds. In this case it would bebetter to make adjacent surfaces of the folds as little radiant aspossible or practicable, and it would be well to cover the surfacesoi'the folds which are toward the ribs with a heat absorbing substance.

What I'claim is'.

'1. In combination, a gas engine cylinder haying cooling ribs and finsseparate from said cylinder extending be tween said cooling ribs so asto intercept the radiant heat from adjacent cooling ribs and prevent oneof said cooling ribs from radiating heat to the other of said coolingribs.

substantially as described.

2. 'In a gas engine, the combination of a cylinder having cooling ribs,a-hood and fins connected with said hood and extending between said ribsso as to intercep t the radiant heat from adjacentwcooling ribs andprevent one of said "ribs from. radiating: heat to the other of saidcooling ribs.

3. In a gas engine. the combination of a cylinder having: cooling ribs,of a hood, the material of said hood beln bent inward and outward toform fins extending between said ribs to intercept the radiant heat fromadjacent ribs and to prevent one of said ribs from radiating heat to theother of said ribs.

. 4. In-a gas engine, the combination of a cylinder having cooling ribsand a hood, the material of said hood being bent inward and outward toform fins extending between said libsio intercept the radiant heat fromadjacent ribs and prevent one of said ribs from radiating heat to theother of said ribs, and beat insulating material between an inward andoutward fold of each of said fins.

5. In combination with anobject to be cooled, having cooling ribsthereon, of this separate from said object extending between adjacentribs so as to intercept the radiant heatfrom said. ribs and prevent oneof said ribs from radiating heat to the other of said ribs.

6. In combination with an object to be co0led,.having cooling ribsthereon, of fins supported beyond-the outer edge of saidlribs andextending between said ribs so as to intercept radiant heat fromadjacent ribs and to prevent one of said ribs from radiating heat to theother of said ribs.

7. The combination with a gas engine cylinder, having cooling ribs, of acomposite fin consisting of two plates of metal separated by a materialadaptedto prevent the transmission of heat rrom one sheet to the otherextendlng between adjacent ribs so as to intercept radiant heat fromsaid ribs and prevent one of said ribs from radiating In testimonywhereof, I sign this specification in the presence of two witnesses.

i ELLIOTT J. STODDARD.

Witnesses 1 MAY E. Ko'r'r,

. ALICE TOWNSEND.

